monkey123 :
Currently have this regex string in my java code:
^[\\w\\-\\ \\#\\.\\/]{0,70}$
It successfully accepts those characters, however it also accepts underscore, how can modify the regex to reject underscore appearing anywhere in the string?
anubhava :
Your regex is:
^[\\w\\-\\ \\#\\.\\/]{0,70}$
It is using \w which is equivalent of [a-zA-Z0-9_], hence it allows underscore also.
You can change your character class to this:
^[-#. a-zA-Z0-9\\/]{0,70}$
Note that space, dot, #, / don't need to be escaped inside [...] and - if placed at first or last position doesn't require escaping either.
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